Big Brother respectively determines a housemate of "upstairs", which must compete on the Duel Arena.
In the Duel Arena both compete in a game and the loser must face the consequences for his residential area.
In the broadcast of 18 August 2015, the rules are changed: One housemate from upstairs and downstairs playing for the entire team.
On top you get to eat again plentiful, while the inhabitants of the bottom have to feed with bread and water.
In addition, in this episode, the entire respective team determined jointly, who must compete for each area, "Up" or "Down", to a duel.